aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/lguest.h
diff options
context:
space:
mode:
authorJes Sorensen <jes@sgi.com>2007-10-21 20:56:26 -0400
committerRusty Russell <rusty@rustcorp.com.au>2007-10-23 01:49:49 -0400
commitc37ae93d597fc63bae979db76b527dcc7740dc9d (patch)
tree2ac25ff96a42593b536d4cdb10f5cbfdb96ef347 /include/linux/lguest.h
parent05aa026a62d0fe0b4664a01d1537984b12567e7c (diff)
Move lguest hcalls to arch-specific header
Move architecture specific portion of lg_hcall code to asm-i386/lg_hcall.h and have it included from linux/lguest.h. [Changed to asm-i386/lguest_hcall.h so documentation finds it -RR] Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Jes Sorensen <jes@sgi.com>
Diffstat (limited to 'include/linux/lguest.h')
-rw-r--r--include/linux/lguest.h69
1 files changed, 4 insertions, 65 deletions
diff --git a/include/linux/lguest.h b/include/linux/lguest.h
index 157ad64aa7ce..d4d94a127f35 100644
--- a/include/linux/lguest.h
+++ b/include/linux/lguest.h
@@ -1,76 +1,15 @@
1/* Things the lguest guest needs to know. Note: like all lguest interfaces, 1/* Things the lguest guest needs to know. Note: like all lguest interfaces,
2 * this is subject to wild and random change between versions. */ 2 * this is subject to wild and random change between versions. */
3#ifndef _ASM_LGUEST_H 3#ifndef _LINUX_LGUEST_H
4#define _ASM_LGUEST_H 4#define _LINUX_LGUEST_H
5 5
6#ifndef __ASSEMBLY__ 6#ifndef __ASSEMBLY__
7#include <asm/irq.h> 7#include <asm/irq.h>
8 8#include <asm/lguest_hcall.h>
9#define LHCALL_FLUSH_ASYNC 0
10#define LHCALL_LGUEST_INIT 1
11#define LHCALL_CRASH 2
12#define LHCALL_LOAD_GDT 3
13#define LHCALL_NEW_PGTABLE 4
14#define LHCALL_FLUSH_TLB 5
15#define LHCALL_LOAD_IDT_ENTRY 6
16#define LHCALL_SET_STACK 7
17#define LHCALL_TS 8
18#define LHCALL_SET_CLOCKEVENT 9
19#define LHCALL_HALT 10
20#define LHCALL_BIND_DMA 12
21#define LHCALL_SEND_DMA 13
22#define LHCALL_SET_PTE 14
23#define LHCALL_SET_PMD 15
24#define LHCALL_LOAD_TLS 16
25 9
26#define LG_CLOCK_MIN_DELTA 100UL 10#define LG_CLOCK_MIN_DELTA 100UL
27#define LG_CLOCK_MAX_DELTA ULONG_MAX 11#define LG_CLOCK_MAX_DELTA ULONG_MAX
28 12
29/*G:031 First, how does our Guest contact the Host to ask for privileged
30 * operations? There are two ways: the direct way is to make a "hypercall",
31 * to make requests of the Host Itself.
32 *
33 * Our hypercall mechanism uses the highest unused trap code (traps 32 and
34 * above are used by real hardware interrupts). Seventeen hypercalls are
35 * available: the hypercall number is put in the %eax register, and the
36 * arguments (when required) are placed in %edx, %ebx and %ecx. If a return
37 * value makes sense, it's returned in %eax.
38 *
39 * Grossly invalid calls result in Sudden Death at the hands of the vengeful
40 * Host, rather than returning failure. This reflects Winston Churchill's
41 * definition of a gentleman: "someone who is only rude intentionally". */
42#define LGUEST_TRAP_ENTRY 0x1F
43
44static inline unsigned long
45hcall(unsigned long call,
46 unsigned long arg1, unsigned long arg2, unsigned long arg3)
47{
48 /* "int" is the Intel instruction to trigger a trap. */
49 asm volatile("int $" __stringify(LGUEST_TRAP_ENTRY)
50 /* The call is in %eax (aka "a"), and can be replaced */
51 : "=a"(call)
52 /* The other arguments are in %eax, %edx, %ebx & %ecx */
53 : "a"(call), "d"(arg1), "b"(arg2), "c"(arg3)
54 /* "memory" means this might write somewhere in memory.
55 * This isn't true for all calls, but it's safe to tell
56 * gcc that it might happen so it doesn't get clever. */
57 : "memory");
58 return call;
59}
60/*:*/
61
62void async_hcall(unsigned long call,
63 unsigned long arg1, unsigned long arg2, unsigned long arg3);
64
65/* Can't use our min() macro here: needs to be a constant */
66#define LGUEST_IRQS (NR_IRQS < 32 ? NR_IRQS: 32)
67
68#define LHCALL_RING_SIZE 64
69struct hcall_ring
70{
71 u32 eax, edx, ebx, ecx;
72};
73
74/*G:032 The second method of communicating with the Host is to via "struct 13/*G:032 The second method of communicating with the Host is to via "struct
75 * lguest_data". The Guest's very first hypercall is to tell the Host where 14 * lguest_data". The Guest's very first hypercall is to tell the Host where
76 * this is, and then the Guest and Host both publish information in it. :*/ 15 * this is, and then the Guest and Host both publish information in it. :*/
@@ -113,4 +52,4 @@ struct lguest_data
113}; 52};
114extern struct lguest_data lguest_data; 53extern struct lguest_data lguest_data;
115#endif /* __ASSEMBLY__ */ 54#endif /* __ASSEMBLY__ */
116#endif /* _ASM_LGUEST_H */ 55#endif /* _LINUX_LGUEST_H */